List addons that have an updated version for the current ember version #22
Description
Related to the issue #16. It would be great to not only list outdated addons, but give the possibility of knowing to which version of the addon I have to upgrade, taking into account the version of Ember I have.
So for instance, if I'm still in Ember 1.13, list the latest version of addon that works with that version of Ember. This could be very useful for upgrades.